01-07-2024, 01:03 PM
The left pump normally supplies the rear heating loop, bedroom. It runs when the rear zone interior thermostat calls for heat. Turn rear thermostat to OFF.
If you remove the bottom clear relay, that should stop the rear zone and the related pump.
If you remove the bottom clear relay, that should stop the rear zone and the related pump.
Rudy Legett
2003 Foretravel U320 4010
ISM11 450 hp Allison 4000R
Factory Authorized Aqua Hot Repair Center
Southeast Texas Area